116 lines
2.6 KiB
C
116 lines
2.6 KiB
C
/* aoc-c.c: Advent of Code 2021, day 1 parts 1 & 2
|
|
*
|
|
* Copyright (C) 2021 Bruno Raoult ("br")
|
|
* Licensed under the GNU General Public License v3.0 or later.
|
|
* Some rights reserved. See COPYING.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with this
|
|
* program. If not, see <https://www.gnu.org/licenses/gpl-3.0-standalone.html>.
|
|
*
|
|
* SPDX-License-Identifier: GPL-3.0-or-later <https://spdx.org/licenses/GPL-3.0-or-later.html>
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
#include "debug.h"
|
|
#include "bits.h"
|
|
#include "pool.h"
|
|
|
|
struct ranges {
|
|
u32 val;
|
|
struct list_head list;
|
|
};
|
|
|
|
LIST_HEAD(list_head);
|
|
|
|
int ex1()
|
|
{
|
|
u32 count = 0, res = 0, prev, cur;
|
|
|
|
while (scanf("%d", &cur) != EOF) {
|
|
if (count && cur > prev)
|
|
res++;
|
|
count++;
|
|
prev = cur;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
int ex2()
|
|
{
|
|
u32 count = 0, res = 0;
|
|
u32 val;
|
|
pool_t *pool;
|
|
struct ranges *input;
|
|
struct ranges *list_cur;
|
|
|
|
if (!(pool = pool_create("pool", 10, sizeof (struct ranges))))
|
|
return -1;
|
|
|
|
while (scanf("%d", &val) != EOF) {
|
|
if (!(input = pool_get(pool)))
|
|
return -1;
|
|
input->val = val;
|
|
list_add_tail(&input->list, &list_head);
|
|
|
|
if (count > 2) {
|
|
u32 loop = 0, v1 = 0, v2 = 0;
|
|
struct ranges *first = list_entry(list_head.next, struct ranges, list);
|
|
|
|
list_for_each_entry(list_cur, &list_head, list) {
|
|
if (loop < 3)
|
|
v1 += list_cur->val;
|
|
if (loop > 0)
|
|
v2 += list_cur->val;
|
|
++loop;
|
|
}
|
|
list_del(&first->list);
|
|
pool_add(pool, first);
|
|
if (v2 > v1)
|
|
res++;
|
|
}
|
|
count++;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
static int usage(char *prg)
|
|
{
|
|
fprintf(stderr, "Usage: %s [-d debug_level] [-p part]\n", prg);
|
|
return 1;
|
|
}
|
|
|
|
int main(int ac, char **av)
|
|
{
|
|
int opt;
|
|
u32 exercise = 1, res;
|
|
|
|
while ((opt = getopt(ac, av, "d:p:")) != -1) {
|
|
switch (opt) {
|
|
case 'd':
|
|
debug_level_set(atoi(optarg));
|
|
break;
|
|
case 'p': /* 1 or 2 */
|
|
exercise = atoi(optarg);
|
|
break;
|
|
default:
|
|
return usage(*av);
|
|
}
|
|
}
|
|
|
|
if (optind < ac)
|
|
return usage(*av);
|
|
|
|
if (exercise == 1) {
|
|
res = ex1();
|
|
printf ("%s : res=%d\n", *av, res);
|
|
} else {
|
|
res = ex2();
|
|
printf ("%s : res=%d\n", *av, res);
|
|
}
|
|
|
|
exit (0);
|
|
}
|